Name:	mho_BestEffortsContractsforCommittedInterestRateLockCommitmentsandMortgageLoansHeldforSaleFairValueDisclosuresAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Convertible senior subordinated notes due 2017 - fair value disclosure

No definition available.

Name:	mho_Convertibleseniorsubordinatednotesdue2017FairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Convertible senior subordinated notes due 2018 - Fair Value Disclosure

No definition available.

Name:	mho_Convertibleseniorsubordinatednotesdue2018FairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Forward sales of mortgage-backed securities

No definition available.

Name:	mho_ForwardContractsFairValueDisclosureAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Forward sales of mortgage-backed securities - fair value disclosures (liabilities)

No definition available.

Name:	mho_ForwardContractsFairValueDisclosuresLiabilities
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Interest Rate Lock Commitments - Fair Value Disclosures (Assets)

No definition available.

Name:	mho_InterestRateLockCommitmentsFairValueDisclosuresAssets
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Interest Rate Lock Commitments - Fair Value Disclosures (Liabilities)

No definition available.

Name:	mho_InterestRateLockCommitmentsFairValueDisclosuresLiabilities
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Mortgage Loans Held For Sale

No definition available.

Name:	mho_MortgageLoansHeldForSale
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Notes Payable - Financial Services Fair Value Disclosure

No definition available.

Name:	mho_NotesPayableFinancialServicesFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Notes Payable - Homebuilding

No definition available.

Name:	mho_NotesPayableHomebuildingFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Including the current and noncurrent portions, this element represents the loans payable which were initially due after one year or beyond the operating cycle, if longer, and which are not otherwise defined in the taxonomy.

No definition available.

Name:	mho_OtherLoansPayableFairValueDisclosure
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

Senior Notes - Fair Value Disclosures

No definition available.

Name:	mho_SeniorNotesFairValueDisclosures
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

Split dollar life insurance policies - amount as of the balance sheet date which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

No definition available.

Name:	mho_SplitDollarLifeInsurancePolicies
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Total Cash, Cash Equivalents and Restricted Cash

No definition available.

Name:	mho_TotalCashCashEquivalentsAndRestrictedCash
Namespace Prefix:	mho_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_AssetsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The fair value of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 10

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13433-108611

Name:	us-gaap_FairValueDisclosureOffbalanceSheetRisksAmountLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

No definition available.

Name:	us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Name:	us-gaap_LiabilitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5

Name:	us-gaap_NotesReceivableNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	us-gaap_FairValueByMeasurementBasisAxis=us-gaap_CarryingReportedAmountFairValueDisclosureMember
Namespace Prefix:
Data Type:	na
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Period Type: